How to correctly resize and rename upladed image in 'save' method?
# Here is our model:
class Product(models.Model):
# some fields
photo = models.ImageField(upload_to='images',
verbose_name=u'zdjęcie', null=True, blank=True)
# and here we are our save method:
def save(self, *args, **kwargs):
if self.photo:
image = Image.open(self.photo)
if image.mode not in ('L', 'RGB'):
image = image.convert('RGB')
image.thumbnail(settings.UPLOADED_IMAGES_SIZE,
Image.ANTIALIAS)
self.photo.open()
image.save(self.photo, 'PNG')
self.photo.name = '%s.png' % os.path.splitext
(self.photo.name)[0]
super(Product, self).save(*args, **kwargs)
everything working but self.photo size(in bytes not width and height)
is wrong(it no changed after resizing), and if we download that image
it have previous size, so i try do it this way:
def save(self, *args, **kwargs):
if self.photo:
image = Image.open(self.photo)
if image.mode not in ('L', 'RGB'):
image = image.convert('RGB')
image.thumbnail(settings.UPLOADED_IMAGES_SIZE,
Image.ANTIALIAS)
tmp_file = StringIO()
image.save(tmp_file, 'PNG')
self.photo.open()
tmp_file.seek(0)
self.photo.write(tmp_file.read())
del image
self.photo.name = '%s.png' % os.path.splitext
(self.photo.name)[0]
# now we have correct image size but i don't know how to
assign it to our image:
# i can't asign it that:
self.photo.size = tmp_file.len
super(Product, self).save(*args, **kwargs)
Anybody know how to solve it?
Łukasz Fidosz
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